What ending is needed to replace the-ar ending so that the verb is in the past tense for the subject pronoun - el - the word is bailar

Translate the sentence below into english.    pienso que nunca lo sabré. a. she doesn't believe he will ever find out. b. i believe that i'd never find out. c. she thinks that i'll never find out. d. i think that i'll never find out.

Hola, susana. pablo. ¿qué tal? answer for blank 1:

Ayúdame con esta tarea de español lo necesito urgentemente