Answer:
C) White shirts are still popular and considered a standard piece of clothing.
Step-by-step explanation:
First we should define classic clothes, which are clothes that have been very popular for many years (e.g. bluejeans) and most people consider that they look good on them.
The only option that fits the description of classic clothes is: C) White shirts are still popular and considered a standard piece of clothing.
All the other options consider white shirts as a non-popular and obsolete garment.