In a group of $500$ Bengali students of age 18 attending online courses during complete lockdown, a Venn diagram tracks their specific enrollment profiles:



If the count of students located at the mutual intersection of all three geometric subsets (learning all three attributes simultaneously) is $50$, what approximately is the percentage of students who are learning all the things?

1. A
   $8\%$
2. B
   $9\%$
3. C
   $10\%$
4. D
   $11\%$