During period of twilight, earth receives diffused light from sun while it is still below horizon. What is/are possible reason(s) for longer twilight period at higher latitudes and the smaller twilight period at equator?

1. Sun rises and sets in vertical path at equator, therefore the period during which diffused light is received is short.

2. At temperate latitudes and at poles, sun rises and sets in an oblique path, therefore period during which diffused light is received is longer at temperate latitudes and this period increases as we move towards poles.

Which of the above statement is/are correct?