Answer
choice C
Work Step by Step
Applying the changes to the model $P(t)=1.921\ln(t)-7.311$
it becomes
$P(t)=2.121\ln(t)-7.211, $
so the coefficient of $\ln(t)$ is still positive,
meaning that as t increases, P increases without bound.
So, the new model predicts eventually higher percentages (choice C).