1.
a?
b?
c?

2.
a?
b?
c?

a:23

b:11

c:5

Explanation:

(A)because of air temperature

(B) because of wet bulb

(C) because of low temperature

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.