Key differences on how Aboriginals used the land vs the way we use our land now.

True the answer is true

The answer would be a.

The highest point of a hill (or mountain) is a single point.
a single point can only be precisely marked with a dot. 
putting on a contour line is impossible  on a single point because the contour line is created after multiple points that have the same hight are marked, and after that, all of those points are connected with a line that creates a closed area. so the highest point, as said above, is a single point, there are no other points with the same height, so the only possible way for it to be marked is with a dot, and there is no possibility for a contour line.

The customers always compliment the pretzels alex makes, saying they taste better than any other pretzels. but alex uses extra ingredients on each pretzel, making the cost per pretzel go up and the profit go down. in a paragraph of no less than 125 words, give alex some constructive feedback on his performance.