Answer: Age is one major factor in any health concerns, including reproductive. During younger years, reproductive health will likely be less of a concern, but in older years there are various issues someone can face.
A crisis means a time of intense difficulty, trouble, or danger. so maybe it's B
A white blood cell<span> ingesting disease-causing </span>bacteria<span>. ... ingest </span>pathogens<span> and destroy them. produce antibodies to destroy particular </span>pathogens<span>. produce antitoxins that counteract the toxins released by </span>pathogens<span>.</span>
Next time use commas, but I believe the answer is C.