Which of the Following Is a Likely Consequence of Low

Which of the following is a likely consequence of low thyroxin secretion in adults?

A) Adults who secrete too little thyroxin may feel tired and sluggish and may put on weight.
B) Adults who secrete too little thyroxin may show symptoms of Down syndrome.
C) Adults who secrete too little thyroxin may experience excitability, insomnia, and weight loss.
D) Adults who secrete too little thyroxin may feel an excess of euphoria under normal circumstances.