He is eager to look through the trunk and impatient most likely because he is riffling through the trunk
A is wrong because "Wendys'" should be "Wendy's", because the possessive isn't plural.
C is wrong because "Its" should be "It's", because "It's" is a contraction for "It is."
D is wrong because the apostrophe should be after "judges", not "statements." Statements do not own anything, but the judges own the statements.
B is the correct answer.
B, the snake raised up its head and struck. 'Up' doesn't need to be there.