True breeding genetics?

A mating between a true breeding red, long -u stamen plant
with a true breeding, white, short - stamen plant yields an F1.
This F1 is self ferlized to product an F2 that has 300 red long - stamen
plant and 100 white short - stamen plants. What can you conclude?

1. The genes are tightly linked
2. The genes are not tightly linked
3. There were no observed crossover events between the genes
A) 1
B) 2
C) 3
D) 1 and 2
E) 2 and 3