Your correct answer would be A. Nervous system
The correct option is this: HAS THE CLAIM BEEN TESTED NUMEROUS TIMES BY MORE THAN ONE SCIENTISTS.
For a claim to be accepted has been valid in the science world, it must have been tested several times by many scientists who obtain the same results. Having a uniform result about a phenomenon is usually considered an important factor when examining the validity of a claim.
I think it’s a hurricane because they are usually on the coast for example Florida
D. Certain genes are turned on and others are turned off; this action produces adult cells that are specialized