What will happen if the eyes of a frog are covered by paper?

Frogs are beneficial for mankind,justify the statement.

Male frogs can be distinguished from female frogs due to the presence of:
$A$. Bulging eyes
$B$. Vocal sacs
$C$. Webbed digits in feet
$D$. Copulatory pad on first digit of fore limbs
$E$. Olive green-coloured skin with dark irregular spots
Choose the correct answer from the options given below:

How do you differentiate a frog from a toad?

Neck is absent in a frog. This helps the frog in:

During the breeding season,the nuptial pad is present on: