Questões de Concurso Público IGP-RS 2017 para Perito Criminal - Química/ Engenharia Química

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?