Mandarin Chinese speakers are found a
primarily in China
b
on all continents and is quickly becoming the most learned global language
c
throughout all of Asia, but primarily in the southern region
d
evenly distributed throughout the world

C

Explanation:

Mandarin is by far the largest of the seven or ten Chinese dialect groups, spoken by 70 percent of all Chinese speakers over a large geographical area, stretching from Yunnan in the southwest to Xinjiang in the northwest and Heilongjiang in the northeast. Most of Northern and Southwestern China.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b