Choice A rationale:

Being exposed to certain toxins or chemicals is indeed a known risk factor for infertility.

Exposure to environmental toxins, industrial chemicals, and pollutants can have adverse effects on reproductive health, leading to infertility.

Therefore, this statement is accurate.

Choice B rationale:

While advanced maternal age is a well-known risk factor for infertility, advanced paternal age can also contribute to infertility, but it is not primarily associated with it.

Both maternal and paternal age can impact fertility, so this statement is less accurate than choice A.

Choice C rationale:

Endometriosis is a known risk factor for infertility.

It is a medical condition where tissue similar to the lining of the uterus grows outside the uterus, affecting fertility.

Therefore, this statement is not accurate, as endometriosis does play a role in infertility risk.

Choice D rationale:

Obesity can indeed impact the risk of infertility.

Excess body weight can disrupt hormonal balance and ovulation in women, leading to fertility problems.

Therefore, this statement is not accurate, as obesity is associated with an increased risk of infertility.