The distribution of the blood kinds of 100 Americans is listed below. If the donor is selcted at random, what is the probability of selecting a person with blood type A+?
Blood Type O+ O- A+ A- B+ B- AB+ AB-
Number 37 6 34 6 10 2 4 1
A. 0.34
B. 0.87
C. 0.4
D. 0.54