A person who demonstrates high standards, such as in doing a homework assignment meticulously, could be described as

A disconsolate
B gaunt
C fastidious

C fastidious

The correct answer is C) fastidious.

The correct answer is C) fastidious.

To determine the correct answer, it is helpful to understand the meaning of each word.

A) "Disconsolate" means extremely sad or unhappy. This word does not relate to demonstrating high standards or doing a homework assignment meticulously.

B) "Gaunt" means thin, typically as a result of sickness or hunger. This word does not relate to demonstrating high standards or doing a homework assignment meticulously.

C) "Fastidious" means to have very high standards, paying attention to detail, and being thorough and meticulous in one's work. This is the most appropriate choice that describes a person who demonstrates high standards, such as in doing a homework assignment meticulously.

To arrive at this answer, it is important to be familiar with the definitions and meanings of the words provided as choices. Additionally, considering the context and characteristics associated with each word can help eliminate incorrect options and identify the most suitable one.