for _ in range(int(input())):
	N, K, X = map(int, input().split())
	H = list(map(int, input().split()))
	m = min(H)
	H = [i - m for i in H]
	if any(i % X for i in H):
		print("No")
		continue
	if any(H[i] < H[i + 1] for i in range(K - 1)) or any(H[i] > H[i + 1] for i in range(N - K, N - 1)):
		print("No")
	else:
		print("Yes")