#include <bits/stdc++.h>
using namespace std;
#define task "task"
#define ii pair<int, int>
#define fi first
#define se second
// #define int long long
#define ll long long
#define ld double
#define mp make_pair
#define lg2 30
#define iii pair<ll, ii>
#define iiii pair<ii, ii>
#define base 29
#define eps 1e-8
int dx[] = {0LL, 0LL, 1, -1, 1, 1, -1, -1};
int dy[] = {1, -1, 0LL, 0LL, 1, -1, 1, -1};
const int maxn = 2e5 + 5, maxm = 1e4 + 5, maxq = 1e5 + 5;
const int mod = 1e9 + 7;
int n, m, q;
ii b[maxn];
int tin[maxn], tout[maxn], timer;
int h[maxn], P[maxn][lg2 + 1];
bool check[maxn];
int thua[maxn], ans[maxn];
vector<int> a[maxn];
struct FEN
{
int n;
vector<int> bit;
FEN() {};
FEN(int _n) : bit(n + 1, 0), n(_n + 1) {
};
int get(int r)
{
int ret = 0;
for (; r >= 0; r = (r & (r + 1)) - 1)
ret += bit[r];
return ret;
}
int get(int l, int r)
{
return get(r) - get(l - 1);
}
void update(int idx, int delta)
{
for (; idx < n; idx = idx | (idx + 1))
bit[idx] += delta;
}
void updateRange(int l, int r, int val)
{
update(l, val);
update(r + 1, -val);
}
} bit;
void dfs(int u, int cha)
{
ans[u] = 1;
tin[u] = ++timer;
for (int v : a[u])
{
if (v == cha)
continue;
h[v] = h[u] + 1;
P[v][0] = u;
dfs(v, u);
}
tout[u] = timer;
}
void build_lca()
{
for (int j = 1; j <= lg2; j++)
{
for (int i = 1; i <= n; i++)
P[i][j] = P[P[i][j - 1]][j - 1];
}
}
int up(int u)
{
for (int i = lg2; i >= 0; i--)
{
if (P[u][i] && bit.get(tin[u]) - bit.get(tin[P[u][i]]) == (1 << i))
{
u = P[u][i];
}
}
return u;
}
void init()
{
cin >> n >> m >> q;
bit = FEN(n);
for (int i = 1; i < n; i++)
{
int u, v;
cin >> u >> v;
a[u].push_back(v);
a[v].push_back(u);
b[i] = {u, v};
}
}
void process()
{
dfs(1, -1);
build_lca();
while (m--)
{
int id;
cin >> id;
int u = b[id].fi, v = b[id].se;
if (h[u] > h[v])
swap(u, v);
if (!check[id])
{
ans[up(u)] += ans[v] - thua[id];
bit.updateRange(tin[v], tout[v], 1);
}
else
{
ans[v] = thua[id] = ans[up(u)];
bit.updateRange(tin[v], tout[v], -1);
}
check[id] ^= 1;
}
while (q--)
{
int x;
cin >> x;
cout << ans[up(x)] << '\n';
}
}
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
if (fopen(task ".inp", "r"))
{
freopen(task ".inp", "r", stdin);
freopen(task ".out", "w", stdout);
}
int t = 1;
// cin>>t;
while (t--)
{
init();
process();
}
cerr << endl
<< "TIME : " << clock() * 0.001 << "s" << endl;
}
