Answer: e. both A and C
Step-by-step explanation:
An endospore can be define as a hard, dormant and non-reproductive structures that develop around the organism. It is in the form of spore or seed like form. But it is not a true spore. These are the asexual structures which are developed in some bacteria under unfavorable environmental conditions such as high temperature, starvation, extreme pH and in desiccation.