Highlight the last sentence after the :
It's 11 words and answeres your question
So, recessive allele 'd' are dwarfs.
The dominant allele is 'D' determines tall.
All you have to do is try to cross the alleles together to get either a homozygous or heterozygous remain. So, you should be able to get Dd or DD.
The answer to your question is,
C. Surface Tension
-Mabel <3
