Question

this trunk is too heavy for me to lift​

Answer 1

When the subject and the object of the verb is the same person or thing, we use a reflexive pronoun.

In the given sentence the subject and the object of the verb is 'me'.

The reflexive pronoun for singular first person 'me' is 'myself'.

Thus option C is the correct answer.

'Himself' and 'Themselves' are the reflexive pronouns for the singular and plural third persons respectively. Thus option A and B are incorrect.

'Ourselves' is the reflexive pronoun for the plural first person. Thus option D is also incorrect.