Scientists are investigating how well different microphones capture and record sounds. They use tools that show how loud the high and low sounds are and a tool that shows how much noise is recorded along with the actual sounds. Which is a scientific question that could be included in this investigation?

A. Which microphone captures a singer’s low sounds the loudest?
B. Which microphone sounds best for a female singing rock music?
C. Which microphone best records high sounds and low sounds?
D. Which microphone is usually a male singer’s favorite?

pls help

Which is the best conclusion that can be drawn regarding the status of african-americans in the south in the late 1800s? a) african-americans made tremendous political, social, and economic advancements during the reconstruction era. b) passage of the 13th, 14th, and 15th amendments to the u.s. constitution guaranteed equal status and rights for all african-americans. c) the reconstruction policies enacted by the federal government were highly effective in african-american citizens transition to life after slavery. d) although african-americans had equal rights under federal law they were still economically, politically, and socially inferior to whites in the south during the reconstruction era.