Refer to the Information Provided in Table 21

Refer to the information provided in Table 21.2 below to answer the questions that follow.
Table 21.2
The data in the table was used to estimate the following consumption function: C = 12 + 0.4Y.
-Refer to Table 21.2. The error for point C is equal to

A) -1.
B) 0.
C) +1.
D) +2.