What is the primary means through which the Sun warms Earth? A. fluctuation of subatomic particles.

B. fluctuation of gravitational fields.

C. transfer of energy through conduction.

D. transfer of energy by electromagnetic waves.

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample