Which pairings correctly depict the way in which dna bases pair? a.adenine pairs with guanine || thymine pairs with cytosine b.adenine pairs with thymine || guanine pairs with cytosine c.adenine pairs with cytosine || thymine pairs with guanine d.adenine pairs with adenine || thymine pairs with thymine

The answer is B.
Each pair can ONLY pair with its other. For example, adenine cannot pair with guanine. It also cannot pair with cytosine and vise versa. It can only be paired with thymine (or uracil for RNA). The same goes for guanine, cytosine, and thymine.

b. the availability of money

Explanation:

Potability of water refers to the quality of a water being drinkable without having adverse health effects. The major barrier to water's potability is pollution, which ia mostly caused by anthropogenic activities.

A factor that most significantly determines a community's access to potable water is the AVAILABILITY OF MONEY. This is because the poor financial state of most communities has led to the involvement in activities that tends to pollute water bodies, even the clean raw water sources. Some of the activities include: open defecation, improper sewage $ refuse disposal etc. The availability of money will help a community to construct infrastructures to protect the potability of their water source.

Also, a community with available funds will build eco-friendly means of disposing wastes.