Making a Punnet square for this, will make it easier to get the right answer. First take into consideration the genotype of each parent. It says that both individuals are heterozygous for both traits. So each of them have a gentoype of PpLl. Using the foil method, we can come up with the Punnet square:
PL Pl pL pl
PL PPLL PPLl PpLL PpLl
Pl PPLl PPll PpLl PPll
pL PpLL PpLl ppLL ppLl
pl PpLl Ppll ppLl ppll
Now the possible phenotypic combinations would be:
Polka dot tail, Long eyelashes: PpLl or PPLL
Polka dot tail, short eyelashes: Ppll or PPll
Solid color tail, Long eyelashes: ppLl or ppLL
Solid color tail, short eyelashes: ppll
Next step is to count how many times their genotype comes out in the Punnet square.
The first combination occurs 9 times.
The second combination occurs 3 times.
The third combination occurs 3 times.
The fourth combination occurs 1 time.
The ratio is the 9:3:3:1 (9 polka dot long, long; 3 polka-dot, short, 3 solid, long; 1 solid, short)
The answer is letter C.