Multiple choice Which is true about TR's efforts to gain rights to Panama Canal zone? Rough Riders invaded Columbia helped a Panamanian revolutionaries vs. Columbia Signed a treaty with Spain Sided with Columbia in a revolution Reveal answer Fill a bubble to check yourself B Correct answer Explanation When Colombia refused the U.S. proposal for the canal zone, Theodore Roosevelt supported Panamanian rebels in their fight for independence from Colombia, which then granted the U.S. the rights to the Canal Zone.