You have two tables named Customers and Orders.
for customers that have placed at least one order, you need to produce a list of customer names and the number of orders for each customer.
Which query should you use?

A.
SELECT c.CustomerName, SUM(o.OrderID) AS [OrderCount]
FROM Customers c
JOIN Orders o ON c.CustomerID = o.CustomerID
GROUP BY c.CustomerName

B.
SELECT COUNT(o.OrderId) AS [OrderCount]
FROM CUSTOMERS c JOIN ORDERS o ON c.CUSTOMERID = o.CUSTOMERID

C.
SELECT c.CustomerName, COUNT(o.OrderID) AS [OrderCount]
FROM Customers c
JOIN Orders o ON c.CustomerID = o.CustomerID
GROUP BY c.CustomerName HAVING COUNT(o.OrderID) > 1

D.
SELECT c.CustomerName, COUNT(o.OrderId) AS [OrderCount]
FROM Customers c JOIN Orders o ON c.CustomerId = o.CustomerId
GROUP BY c.CustomerName