**Answer:**

A

**Explanation:**

Let's say x represents adult tickets, and y represents child tickets.

We know that 2 adult tickets, x, and 2 child tickets, y, added together total $26. This can be written as:

2x+2y=26

We also know that 2 adult tickets, x, and 3 child tickets, y, added together total $31. This can be written as:

2x+3y=31

So, our system is:

2x+2y=26

2x+3y=31

Therefore, choice A is correct.

My guess would definitely be false, public transportation seems like a much more reliable mean.

**Answer:**

U-shaped valleys, hanging valleys, cirques, horns, and aretes

**Explanation:**

Ranching & manufacturing i believe, I know manufacturing is correct though