Answer:
D:To work is an infinitive
Explanation:
To is part of the infinitive, it is an infinitive particle. Work is a verb (or bare infinitive, without the infinitive particle. ); the union of to and work forms the infinitive (to work). In the sentence "She goes to work", to is a preposition and work is a noun. Working is a gerund. Working hard is one of Tom's many characteristics that impressed his employer.
