Liquidity risk in private equity

Q. Which of the following poses the least direct liquidity risk associated with owning a position in a private equity fund?

  1. A secondary market for private equity holdings created by a general partner
  2. The long holding period required by the private equity fund
  3. Adverse conditions in public markets

Which one do you think?

Why?

I answered (1) because I believe it reduces liquidity risk for a LP?