The universal blood donor is:
a. type a
b. type b
c. type o
d. type ab

C. Type O

Explanation:

The universal blood donor is type O.

O can either be an O-Positive or an O-Negative blood type.

O-Positives typically are better for donation.

answer:

alrighty thx

explanation:

violet light has a shorter wavelength than blue light. violet light is scattered more than blue light. however, the human eye is less sensitive to violet than to blue. as a result, we perceive a blue sky instead of a violet sky.