read_line.to_i.times do
  puts solve() ? "Yes" : "No"
end

def solve
  n, k, x = read_line.split.map(&.to_i)
  h = read_line.split.map(&.to_i64)
  min = h.min
  h.map! { |v| v - min }
  if h.any? { |v| v % x != 0 }
    return false
  end
  h.map! { |v| v // x }
  diff = Array.new(n - 1) { |i| h[i + 1] - h[i] }
  ok = true
  k.times.all? do |i|
    c = 0i64
    if i == k - 1
      c = -(1i64 << 50)
    end
    i.step(to: diff.size - 1, by: k) do |j|
      if c <= 0
        c = diff[j] + c
      else
        ok = false
        break
      end
    end
    if i == k - 1
      if c > 0
        ok = false
      end
    elsif (diff.size - i) % k == 0
      if c > 0
        ok = false
      end
    else
      if c != 0
        ok = false
      end
    end
    if !ok
      break
    end
  end
  ok
end