Step 1: Start with the meaning of the two terms.
Assimilation means a minority group gives up its own ways and takes on the ways of the dominant group. Integration, as used in this chapter, means bringing groups into a single national mould.
Step 2: Pick out the common target.
Both policies aim at a single common culture across the nation. They treat group differences as something to be reduced in public life, not protected.
Step 3: Test each option against this target.
Option 1 (hybrid identities) and option 4 (autonomy for minorities) protect difference, so they belong to multicultural thinking. Option 2 (adopting minority symbols) lifts minority culture up, which is again the opposite of blending minorities into the majority.
Step 4: Find the match.
Only option 3 speaks of making every citizen follow one uniform set of values and norms. This is the core feature of both policies.
Step 5: Why the other options fail.
Option 1 says: Accomodating heterogeneous and hybrid identity of populations.. This does not fit the idea we settled on, so it cannot be the answer.
Option 2 says: Adopting the symbols and heroes of minority groups.. This does not fit the idea we settled on, so it cannot be the answer.
Option 4 says: Decentralising powers and autonomy so that it spreads to minority groups too.. This does not fit the idea we settled on, so it cannot be the answer.
Step 6: Quick check.
Read the chosen option again in full: Forcing all citizens to adopt a uniform set of cultural values and norms.. It agrees with the facts above, and each of the other three options clashes with them. So the answer stays the same after this second look.
Final Answer:
So the right choice is the third option, which talks about uniform cultural values.
\[ \boxed{\text{Option 3}} \]