Consider a Production Possibilities Curve for an Economy Producing Bicycles

Consider a production possibilities curve for an economy producing bicycles and video game players. Under what circumstances is it possible to increase the production of bicycles without sacrificing video game players?

A) if the production possibilities curve shifts outward due to decreased immigration (which reduces the labour force)
B) if the economy moves from one point on the production possibilities curve to another point on the curve
C) if the economy moves from a point outside the production possibilities curve to a point inside the curve
D) if the production possibilities curve shifts outward due to technological progress