[choices in the image below!] A horticulturist wants to produce geraniums with specific characteristics. She knows that the trait of red flowers is governed by the allele R (RR and Rr) and the trait of white flowers is governed by the allele r(rr).

The horticulturist plans to cross a geranium that is true-breeding for red flowers with a geranium that is true-breeding for white flowers.

Which Punnett square best describes this cross?