Your network contains three Active Directory forestsnamed Forest1, Forest2and Forest3.
Each forestcontains three domains.
A two-way forest trustexists between Forest1and Forest2.
A two-way forest trustexists between Forest2and Forest3.
You need to configure the forests to meet the followingrequirements:
Usersin Forest3must be able to access resources in Forest1
Usersin Forest1must be able to access resources in Forest3.
The number of trusts must be minimized.
What should you do?

A.
In Forest2, modify the name suffix routing settings.

B.
In Forest1 and Forest3, configure selective authentication.

C.
In Forest1 and Forest3, modify the name suffix routing settings.

D.
Create a two-way forest trust between Forest1 andForest3.

E.
Create a shortcut trust in Forest1 and a shortcuttrust in Forest3.

Explanation:
Reference:
MS Press – Self-Paced Training Kit (Exam 70-640) (2nd Edition, December 14 2012)
page 639:
Forest Trusts
(…)
You can specify whether the forest trust is one-way, incoming or outgoing, or two-way. As mentioned earlier, a
forest trust is transitive, allowing all domains ina trusting forest to trust all domains in a trusted forest. However,
forest trusts are not themselves transitive. For example, if the tailspintoys.com forest trusts the
worldwideimporters .com forest, and the worldwideimporters.com forest trusts the northwindtraders.com forest,
those two trust relationships do not allow the tailspintoys.com forest to trust the northwindtraders.com forest. If
you want those two forests to trust each other, youmust create a specific forest trust between them.