There’s only one conjunction in this sentence and it’s the word “and”. A conjunction is a word that joins words phrases or a sentence. Good luck!
When it comes to regular verbs, the way to create past tense is to add -ed (if the verb ends with a consonant), or -d (if the verb ends with a vowel).
So, the verb smile ends in e, which means that you only need to add -d to create past tense. The correct answer is:
Mona Lisa smiled mysteriously.
