Respuesta :
Answer:
D) unreliable
Explanation:
One of the definitions of the adjective “poor” is something of a low or inferior standard or quality, or something that is worse than expected, and therefore, it is also something that one can not rely on to be accurate or good in quality. In the paragraph, the word poor has this connotation: The eyesight of the bat is poor, thus, it can not be reliable.