Scientists are investigating the effects of leaves mixed in with the soil on tomato production. in the investigation, an identical quantity and type of soil was placed in four large pots. however, 15 kg of leaves were added to the first pot, 10 kg to the second and 5 kg to the third. no leaves were added to the fourth pot. tomatoes were then planted in these pots. all the pots were placed in sunlight and watered identically. tomatoes obtained from each pot were weighed and recorded. what is the outcome variable (dependent variable) in this experiment?
A) Quantity of soil
B) Type of soil
C) Weight of tomatoes
D) Presence of leaves
