#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 ;
}
