Choose the question that has only one possible answer. A. How tall are you?
B. What are the lengths of the lizards in your backyard?
C. What are the heights of the people in your class

A. How tall are you?

Step-by-step explanation:

The response given to a questions will usually depend on the type of question asked. We have the open ended and the close ended. depending on whether the question can be answered by a yes or no alternative.

The question how tall are you? Simply requires a phrase answer with the height of the person being asked. Such as 6 feets, 12 feets, etc.

The question, length of lizards in backyard and the height of students in class requires a range of values to express the height of the lizards and students.

your answer is  

a.

5

step-by-step explanation:

you are playing an adventure game on your computer. you come across a troll who won't let you pass and there is no other way to get to the other side of the river except over the bridge he is guarding.

the troll is a nerd. he takes great delight in watching people struggle with his problems. very few get them. he only gives you one chance and then he changes the puzzle. you have to solve this one.

before you are four blocks. they are numbered 11,6, -7,21.

he tells that the answer he wants is minus and between -1 and - 2. you can use +, -, ×, ÷   ( and ) as many times as you like or no times at all. you don't like the way he's looking at you, but you need to cross the bridge. what do you do?