The sentence that is written correctly is <u>C. My father has just won a trip to Australia.</u>
<span><span>A. is wrong because Australia is a proper noun and should be capitalized.</span></span>
<span><span /></span><span><span>B</span></span><span><span>. is wrong because father in this case is not a proper noun and should not have been capitalized and Australia is a proper noun and should be capitalized.
</span></span><span><span>D. is wrong because father in this case is not a proper noun and should not have been capitalized.</span></span>
<span><span>Hope this helps.:)</span>
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