D) <em>Alan and </em><u><em>I </em></u><em>baked a strawberry-rhubarb pie</em>. This is the correct option.
The underlined pronoun is in the nominative case. The nominative case is needed before the verb "To bake",
These options are not right.
-A) Yesterday Bob and <em>me</em> worked at the outdoor market. ( The objective pronoun "me" should be replaced by the nominative "I". "To work" needs nominative cases).
B) Last Saturday <em>them</em> and <em>her </em>went to the movies. ( The objective cases "them" and "her" are wrong . "They" and " she" are the correct form.)
C) is that <em>her</em> at the front door? ( This is correct but "her" is in the objective case not in the nominative).