Weather decisions

This task is about weather and clouds.

Question

a.  One evening in April a gardener saw this weather forecast for his town on television. 
 
weather-decisions-tv.png
 
     He decided to go out and pick all the tomatoes left on his plants because ...

    • there would be no more warm weather.

    • there would probably be a frost.

    • the plants had grown to full size.

    • the tomatoes were as ripe as they would ever be.

Question

  1. Which type of cloud is most likely to produce rain?