As a change to the network for the current update, activity 6002 is required to...

 Logic Organization Requirement:

Activity 6002 is required to begin 10 days after the start of Activity 6001.

A start-to-start (SS) relationship with a 10-day lag effectively captures this requirement.

 Exclusion of Other Options:

Option B: Placing the lag on Activity 6002 introduces unnecessary complexity.

Option C: Start-to-finish relationships are not appropriate for this situation.

Option D: A finish-to-start relationship does not meet the requirement of aligning start times.

 Verification with PSP Guidelines:The PSP Study Guide emphasizes using SS relationships with lags for activities that need staggered starts (Ref: PSP Study Guide, Chapter 2A: Relationships and Lags).