6.1.2 Putting Together Control Structures

Which of the following does the clear command do?
A. Clears the screen of any markings left by Tracy
B. Turns Tracy to face right
C. Sends Tracy to position (0,0)
- A only

Which of the following statements is true about control structures?
- If/else statements can be used inside for loops.

What would be the output of the following code? 
1 count = 10 
2 Length = 10
3 
4 while count > 0:
5    for i in range(4):
6        forward(length)
7        left(90)
8 Length = length + 10 
9 count = count - 1
- https://codehs.com/uploads/7d8f739ee3afd2c792471d9002ca44d0