Fill in the blank with the gerund, infinitive or other appropriate form of the verb:
She finds it easy __________ a chess game against her brother.
A verb is used to express an occurrence, action, or state. It is the grammatical centre of the predicate in a sentence.
D. to win is correct as the sentence expresses a direction to what she finds easy.
A. won is in simple past tense and it denotes an action that is already happened whereas we want to present a habitual action in present. So, it is incorrect.