The soil A depicted in the table is considered suitable for AASHTO classification system. $q,$ according to the

$\backslash$table$[[\backslash$table$[[$Sieve analysis$-],[$Percent finer$]],,],[,,,,,],[$Soil$,$No$.10,$No$.40,$No$.200,\backslash$table$[[$Liquid$],[$limit$]],\backslash$table$[[$Plasticity$],[$index$]]],[$A$,90,74,32,28,9]]$

Select one:

a$.$ subgrade materials

b$.$ water drainage

c$.$ flood protection

d$.$ crop production