Which of the Following Studies Apply to This: Persons Diagnosed

Multiple Choice

which of the following studies apply to this: Persons diagnosed with new-onset Lyme disease were asked how often they walk through woods, use insect repellant, wear short sleeves and pants, etc. Twice as many patients without Lyme disease from the same physician's practice were asked the same questions, and the responses in the two groups were compared?

A) Observational cross-sectional.
B) Observational cohort.
C) Observational case-control.
D) Experimental.