Consider the statements below: I. The plural of the wor...

Consider the statements below:

I. The plural of the word ‘beauty’ (l.40) follows the same rule that explains the formation of the plural form ‘displays’ (l.24).

II. The plural of ‘crisis’ (l.05) is made by dropping ‘is’ and adding ‘es’.

III. The rule that explains the formation of ‘values’ (l.30) and ‘pages’ (l.13) is the same.

Which ones are correct?