Suppose we want to examine the effect of a fertilizer on the size of zucchini produced, and ...

Suppose we want to examine the effect of a fertilizer on the size of zucchini produced, and therefore, we need to
  establish the experimental and control groups. The control group for this experiment would be defined under which
  conditions?
  a. soil, fertilizer, water, sun, but no zucchini seeds
  b. soil, fertilizer, water, sun, and zucchini seeds
  c. soil, water, sun, and no zucchini seeds
  d. soil, water, sun, and zucchini seeds
  e. soil, water, and sun

Question 2

During an experiment, what is the purpose of a control group?
  a. To verify data
  b. To disprove the theory
  c. To prove the hypothesis
  d. To produce replicated results of other groups
  e. To compare results to the experimental group with the variable being tested