Match the mpage options with their functionalities.
1. mpage -r a. toggle printing on both sides of the paper (duplex mode)
2. mpage -t b. print in landscape mode instead of the default portrait
3. mpage -I c. reverse the order in which the pages are printed
A.
1-c, 2-a, 3-b
B.
1-b, 2-c, 3-a
C.
1-c, 2-b, 3-a
D.
1-b, 2-a, 3-c