Solve for the value(s) of constant c that will make h(x) continuous at x = −1. h(x) = { (x + c)^2 if x < -1
c + x if x >= -1 }

A. c = 0 only
B. c = 1 and c = 2
C. c = 1 only
D. c = 1 and c = -2

Please justify your answer with a step by step process.

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.