Answer:
Option D 6 is the answer
Explanation:
The tree diagram shows selections possible for different sizez, colors, closures.
We have to find the number of ways for selecting jackets with buttons
Since buttons only is the constraint, we can take that he can have any number size and also any colour.
No of sizes =3 as small medium and large
No of colours = blue and green
No of possible ways of choosing a jacket with buttons
=no of sizesxno of colours
=3x2=6