Which of the following sentences is in the active voice?

A
The tractor was driven across the field.

B
The field was plowed by the farmer.

C
The grass had been eaten by the cows.

D
The family planted the seeds.

Robert has 78 tomato lants and 56 cucumber plants .he wants to plant them in rows that only have one type of plant in each row with the same number of plants in each row. how many plants should he put in each row and how many rows of each type of plant will he need