Choose the letter A, B, C, or D to indicate the sentence that is combined from two following sentences.

Jack went to Ha Noi. He wanted to see Ho Chi Minh's Mausoleum and Hoan Kiem Lake.

Sarah asked if Vietnam has Ha Long Bay.

Sarah said that Ha Long Bay was in Vietnam.

Sarah asks whether Ha Long Bay is in Vietnam.

Sarah asks whether Ha Long Bay belongs to Vietnam.

He is the only person to answer all questions about President Ho Chi Minh.

He is the only person answered all questions about President Ho Chi Minh.

He was the only person to answer all questions about President Ho Chi Minh.

He is the only person answering all questions about President Ho Chi Minh.

My friend has booked a plane ticket to Hue to see monuments.

My friend has booked a plane ticket to Hue seeing monuments.

My friend has booked a plane ticket to Hue seen monuments there.

My friend has booked a plane ticket to Hue and seen monuments there.

The child asked if penguins were native to the Arctic.

The child wanted to know where penguins lived.

The child asked whether were the penguins native to the Arctic.

The child asked whether the penguins are native to the Arctic.

The teacher asked were there any active volcanoes in Hawaii.

The teacher explained that volcanoes could erupt in Hawaii.

The teacher asked if there were any active volcanoes in Hawaii.

The teacher asked to know the location of the volcanoes in Hawaii.

She explained that the stalagmites and stalactites in the cave are incredible.

She remarked that the stalagmites and stalactites in the cave were incredible.

She announced the discovery of stalagmites and stalactites in the cave.

She wanted to know the beauty of the cave’s stalagmites and stalactites.

Sarah wondered if the Great Barrier Reef was safe to swim in.

Sarah required me to swim in the Great Barrier Reef.

Sarah asked if I could swim in the Great Barrier Reef.

Sarah wanted to know if she could swim in the Great Barrier Reef.