Answer:
B. +m
Explanation:
The magnification of an image is defined as the ratio between the size of the image and of the object:

where we have
y' = size of the image
y = size of the object
There are two possible situations:
- When m is positive, y' has same sign as y: this means that the image image is upright
- When m is negative, y' has opposite sign to y: this means that the image is upside down
Therefore, the correct option representing an upright image is
B. +m
The answer is C,<span> The sum of all forces acting on the object is zero. hope that helps!!</span>
Answer: Gravitational force between the two masses does not depend on the medium separating two masses.
Do you have any Options like answer choices?