Answer:
A
Explanation:
A is the only adjective or describing situation; describing how she looked while the others use the adverb cheerfully to describe further the verb that came before it.
Present perfect tense. Have washed is the verb, Have or Has is used to show an action that has taken place in the present, not quite long or is still taking place
The answer is c because it says in my engish book that the sentence will start with: AS , WHILE , AS LONG , ALTHOUGH , UNLESS , WHEN , AFTER , AS , IF , EVENTHOUGH