Walk out on (someone)

Do you know the English expression “to walk out on (someone)“? Read the conversation below. Can you guess the meaning?

Paul: I watched a really sad movie last night.

Lisa: What was it about?

Paul: It was about a young boy. He had many problems because his father suddenly walked out on him and his mother.

Does it mean:

a) abandon

b) go away for a few years

c) make someone walk far

d) damage

The answer is below!↓

 

Answer: a) abandon