Correct answer choice is:
D. Frequency.
Explanation:
AC frequency is the number of periods per moment in an alternating current (ac) sine wave. Said different mode, the frequency is the scale at which the current varies course per instant. It is estimated in hertz (Hz), a global unit of measure wherever 1 hertz is equivalent to 1 cycle per instant.
I think the answer is B, but there is a chance it is C. But B seems more likely
CDC protect America from health, safety and security threats, both foreign and in the U.S whether diseases start at home or not
Answer:
B) care or concern for another person going through a difficult situation.
Explanation:
