In a plant,red fruit $(R)$ is dominant over yellow fruit $(r)$ and tallness $(T)$ is dominant over shortness $(t)$. If a plant with $RRTt$ genotype is crossed with a plant that is $rrtt$,what will be the phenotypic ratio of the offspring?

• A
  $75\%$ will be tall with red fruit
• B
  All the offspring will be tall with red fruit
• C
  $25\%$ will be tall with red fruit
• D
  $50\%$ will be tall with red fruit