Scientists performed many experiments on the challenger. these experiments did not include

deep sea trawling
bottom sampling
water analysis
sonar soundings

The best and most correct answer among the choices provided by your question is the third choice.

The experiments that scientists performed in Challenger did not include water analysis.

I hope my answer has come to your help. Thank you for posting your question here in . We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

The correct answer should be brand c.