Why should scientific evidence rather than anecdotal evidence be used to investigate the validity of a scientific claim?

Choose one or more:
A. Scientific evidence can be empirically tested and verified.
B. Scientific evidence is only collected by scientists.
C. Anecdotal evidence represents only one or a few observations about a particular natural phenomenon.
D. Anecdotal evidence represents all the collected data and observations about a particular natural phenomenon.

A. Scientific evidence can be empirically tested and verified.

C. Anecdotal evidence represents only one or a few observations about a particular natural phenomenon.