When changes build up on a surface they:
a. apply a force to charges wandering nearby.
b. create an electric field.
c. a and b
d. a or b

A and B

Explanation:

An electric field develops around a charge. The electric field lines represent the region in space where a positive test charge experiences an electric force. A electric force exists between  the two charges.

Thus, when charges build up on a surface, they apply force to charges wandering nearby and also create electric field. So, correct option is Both A and B.

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.