From the cross aaxaa the possibility of producing a homozygous dominant offspring is

The probability of producing a  dominant homozygous offspring is 25% or 1/4.

Explanation: From the cross Aa x Aa is obtained offspring with genotypes: 1) dominant homozygous  (AA, 25% or 1/4), 2) Heterozygous (Aa, 50% or 1/2) and 3) Recessive homozygous (aa, 25% or 1/4).

i think that c)gold was found there

but i am not sure