What did J.J. Thomson’s experiments with cathode ray tubes imply about the mass of an electron?

Question

Electrons are many thousand times larger than the nucleus and negatively charged.
Electrons are many thousand times smaller than the nucleus and positively charged.
Electrons are many thousand times smaller than the nucleus and negatively charged.
Electrons are many thousand times larger than the nucleus and possess no charge.

Answer 1

J.J. Thomson's experiments with cathode ray tubes led to the conclusion that electrons are many thousand times smaller than the nucleus and negatively charged. Therefore, the correct answer is:

Electrons are many thousand times smaller than the nucleus and negatively charged.