#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
const int MaxN = 1e6 + 5;
const int MaxLog = 20;
struct Edge
{
int u, v, pre;
bool open;
};
int n, m, q;
Edge edges[MaxN];
vector<int> graph[MaxN];
void Inp()
{
cin >> n >> m >> q;
for (int x = 1; x < n; x++)
{
cin >> edges[x].u >> edges[x].v;
edges[x].pre = edges[x].open = 0;
graph[edges[x].u].push_back(x);
graph[edges[x].v].push_back(x);
}
}
int curDFS;
int in[MaxN];
int out[MaxN];
int h[MaxN];
int par[MaxN];
void PreDFS(int u, int p)
{
curDFS++;
in[u] = curDFS;
for (int x : graph[u])
{
int v = edges[x].u ^ edges[x].v ^ u;
if (v != p)
{
if (edges[x].u == v)
{
swap(edges[x].u, edges[x].v);
}
h[v] = h[u] + 1;
par[v] = u;
PreDFS(v, u);
}
}
out[u] = curDFS;
}
int Fenwick[MaxN];
int BinLift[MaxLog][MaxN];
void Build()
{
for (int x = 1; x <= n; x++)
{
BinLift[0][x] = par[x];
}
for (int x = 1; x < MaxLog; x++)
{
for (int y = 1; y <= n; y++)
{
BinLift[x][y] = BinLift[x - 1][BinLift[x - 1][y]];
}
}
}
void Add(int u, int delta)
{
int idx = u;
while (idx <= n)
{
Fenwick[idx] += delta;
idx += (idx & (-idx));
}
}
int Get(int u)
{
int idx = u, res = 0;
while (idx > 0)
{
res += Fenwick[idx];
idx -= (idx & (-idx));
}
return res;
}
int cnt[MaxN];
int FindPar(int u)
{
int cur = Get(in[u]), v = u;
for (int x = MaxLog - 1; x >= 0; x--)
{
if (BinLift[x][v] > 0 && Get(in[BinLift[x][v]]) == cur)
{
v = BinLift[x][v];
}
}
return v;
}
void Link(int id)
{
int u = FindPar(edges[id].u), v = edges[id].v;
cnt[u] = cnt[u] + cnt[v] - edges[id].pre;
cnt[v] = 0;
Add(in[v], -1);
Add(out[v] + 1, 1);
}
void Cut(int id)
{
int u = FindPar(edges[id].u), v = edges[id].v;
cnt[v] = cnt[u];
edges[id].pre = cnt[u];
Add(in[v], 1);
Add(out[v] + 1, -1);
}
void Exc()
{
PreDFS(1, -1);
Build();
for (int x = 1; x <= n; x++)
{
cnt[x] = 1;
Add(in[x], (x > 1));
Add(out[x] + 1, -(x > 1));
}
for (int x = 1; x <= m; x++)
{
int u;
cin >> u;
edges[u].open ^= 1;
if (edges[u].open)
{
Link(u);
}
else
{
Cut(u);
}
}
for (int x = 1; x <= q; x++)
{
int u;
cin >> u;
cout << cnt[FindPar(u)] << "\n";
}
}
int main()
{
//freopen("C.INP", "r", stdin);
//freopen("C.OUT", "w", stdout);
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int test = 1;
//cin >> test;
for (int x = 1; x <= test; x++)
{
Inp();
Exc();
}
return 0;
}
