But the first time we left Mat in the house unattended , he chewed up one set , and Ginger finished the other set off by crawling through them and breaking them . We ' ve replaced one , but in order to avoid the new blinds from meeting the same fate as the old ones , they are permanently tied off at the halfway mark . Which means the bottom half of our 6 ft long windows are completely exposed .
Why did the writer tie off their blinds at the halfway mark ?
Pick the best answer from the following options:
A. None of the above choices .
B. They wanted to have the bottom half of their windows exposed .
C. Because their pets destroyed the blinds they had so that was the best solution they could come up with .
D. Because they wanted to replace them .


C