Which of the following SQL commands would retrieve all orders placed during the month of January 2018
a. SELECT * FROM orders WHERE order_date BETWEEN '2018-01-01' AND '2018-01-31'
b. SELECT * FROM orders WHERE order_date > '2018-01-01' AND order_date < '2018-01-31'
c. SELECT * FROM orders WHERE order_date IN('2010-01-01', '2016-01-31')
d. SELECT * FROM orders WHERE order_date RANGE '2018-01-*'