When Lily does a self-inventory, she lists her knowledge of Excel, her proficiency in bookkeeping, and her training in customer service. These go under the category of:

A. goals.

B. abilities.

C. attributes.

The above mentioned qualities go under the category of abilities.

Step-by-step explanation:

Lily does a self-inventory to find out theat she has knowledge of Excel, proficiency in bookkeeping and training in customer service.

Ability is used to refer a person's native aptitude in a specific field.

Ability can also be trained and honed and can be made better with practice.

All of Lily's qualities mentioned come under the same above mentioned specifications. All her talents can be trained and can be bettered.

Hence her qualities come under the category of abilities.