Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Noise pollution is becoming more and more common in modern life. In big cities, the sound of traffic, construction, loud music, and even crowded markets makes the environment very noisy. Unlike air or water pollution, people often pay less attention to noise pollution, but it can also be very harmful.

One of the main effects of noise pollution is on people's health. Constant loud noise can cause stress, headaches, and difficulty in sleeping. Students may find it hard to concentrate on their lessons, and workers may feel tired and lose productivity. In some cases, people who are exposed to very loud noise for a long time may even suffer hearing loss. Noise also makes people feel uncomfortable and easily become angry.

Although it is difficult to avoid noise completely, there are some solutions. Cities should limit construction at night and encourage people to keep the volume low in public places. Planting more trees can also help reduce noise. If everyone becomes more aware of this problem, life will be quieter and people will feel healthier and happier.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correc...