Each Day Sue Works 8 Hours and Produces 7 Units

Each day Sue works 8 hours and produces 7 units of goods and services.Mary works 10 hours each day and produces 10 units of goods and services.It follows that

A) Sue's productivity is higher than Mary's.
B) Mary's productivity is higher than Sue's.
C) Sue's income per hour will be higher than Mary's.
D) Sue's income per day will be higher than Mary's.