What does the statement “English is part of Australia’s national identity” mean in this context?

What does the statement “English is part of Australia’s national identity” mean in this context?

• AEnglish is connected to how Australia identifies as a nation.Correct
• BEnglish is the only language spoken by people in Australia.
• CEnglish is unrelated to Australia’s identity.
• DEnglish is mainly important only outside Australia.

The fact directly connects English with Australia’s national identity, meaning it is connected to how Australia identifies as a nation.