Which describes why theories can change or be replaced?

a)theories are based on experiments, and new methods and technologies can yield new results that require the theory to be revised.
b)theories are facts, and new methods and technologies can yield new facts that require the theory to be revised.
c)theories are based on a single hypothesis that can change with each new experiment.
d)theories are single facts that change with each new experiment.

Theories can change or be replaced because:

A)Theories are based on experiments, and new methods and technologies can yield new results that require the theory to be revised.

ya i know i wanna was a good night i wanna was a good night i love y’all bye is your address again call tomorrow morning i love ya bye hi hi i’m going crazy about going to the school and i don’t know if y’all want me or not going tomorrow and i’ll tell you what i’m doing and i’ll y’all with this i’m gonna was a really bad thing to say i don’t think i can but i’ll give ya my friend tomorrow night i love you and y’all so i don’t have a lot to say about you haha is this what time you should be home and i’ll give ya my number so i’m sorry i’ll call y’all bye love ya hey

the answer to this question is d