Read the excerpt:

The Suez Canal links the Mediterranean Sea with the Red Sea, so ships can travel between Europe and Asia without sailing around Africa. It opened in 1869 after ten years of construction. The canal has no locks because the two seas are at nearly the same level. Today about twelve percent of world trade passes through it, which makes its smooth operation important to the global economy.

Why does the canal need no locks?

Answer and explanation

Correct answer: A. The two seas are at nearly the same level

  1. Step 1: Find the relevant detail in the text: "the two seas are at nearly the same level".
  2. Step 2: This detail answers the question directly.
Answer
The two seas are at nearly the same level.
Why not the others: "The canal is very short" is not supported by the text; "Ships are very small" is not supported by the text; "The water is shallow" is not supported by the text.

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