IM BEING TIMED PLS HELP Farrell built a circuit based on the diagram below. What kind of circuit did he build?
(A
O A a short circuit
O B. a parallel circuit
O C. a complex circuit
D. a series circuit

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?