#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 4000000000000000001LL
void dfs(int cv,int pv,vector<vector<int>> &E,vector<int> &b,int k){
	rep(i,E[cv].size()){
		int to = E[cv][i];
		if(to!=pv)dfs(to,cv,E,b,k);
	}
	if(pv != -1){
		b[cv] %= k;
		if(b[cv]<0)b[cv] += k;
		b[pv] -= b[cv];
		b[cv] = 0;
		b[pv] %= k;
		if(b[pv]<0)b[pv] += k;
		
	}
	
}

int main(){
	
	int _t;
	cin>>_t;
	rep(_,_t){
		int n,m,k;
		cin>>n>>m>>k;
		vector<vector<int>> E(n);
		rep(i,m){
			int u,v;
			cin>>u>>v;
			u--,v--;
			E[u].push_back(v);
			E[v].push_back(u);
		}
		vector<int> b(n);
		rep(i,n)cin>>b[i];
		dfs(0,-1,E,b,k);
		if(b==vector<int>(n,0))cout<<"Yes"<<endl;
		else cout<<"No"<<endl;
		
	}
	return 0;
}