Consider a WBS with a level $1$ activity that splits into five level two activities. Each of the level two activities splits into three distinct level $3$ activities.

Which of the following statements is accurate?

Answer

the cost of any single level $2$ activity must exceed that of any level $3$ activity

the cost of all level $2$ activities$$must exceed that of any single level $1$activity

the cost of any single level $1$ activity must exceed that of any level $3$ activity

the cost of all level $3$activities$$must equal that of all level $2$ activities