What change in thermal activity may be expected with cirrus clouds coming up from one direction and becoming more dense, blocking the sun?

Question

Question Quiz SPL - Sailplane Pilot License - Meteorology

QuizVDS · Accepted Answer

Cirrus clouds prevent insolation and impair thermal activity.

QuizVDS · Answer

Cirrus clouds may intensify insolation and improve thermal activity

QuizVDS · Answer

Cirrus clouds indicate an high-level inversion with thermal activity ongoing up to that level

QuizVDS · Answer

Cirrus clouds indicate instability and beginning of over-development

Id 302 - SPL - What change in thermal activity may be expected with cirrus clouds coming up from one direction and becoming more dense, blocking the sun?