Choose the sentence that best combines each pair of sentences given.

The rapid urbanization led to many serious problems. One of those is the growth of slums.

The demand for labor force declined.

The demand for labor force increased.

The demand for labor force reduced.

The demand for labor force remained stable.

The price decreased by 280 in 1995 before stabilizing for the next 3 years.

The price decreased for 280 in 1995 before leveling off for the next 3 years.

The price increased by 280 in 1995 before leveling off for the next 3 years.

The price increased for 280 in 1995 before stabilizing for the next 3 years.

Asia is home to 50 per cent of the world's urban population although Europe is home to 14 per cent of the world's urban population.

Asia is home to 50 per cent of the world's urban population due to Europe is home to 14 per cent of the world's urban population.

Asia is home to 50 per cent of the world's urban population, nevertheless, Europe is home to 14 per cent of the world's urban population.

Asia is home to 50 per cent of the world's urban population whereas Europe is home to 14 per cent of the world's urban population.

If public transport is improved, traffic congestion in urban areas can be reduced.

Traffic congestion in urban areas can be reduced although public transport is improved.

Traffic congestion in urban areas can be reduced despite public transport is improved.

If public transport is improved, traffic congestion in urban areas cannot be reduced.

Although increasing urbanization has led to problems, but cities are centers of civilization and culture.

Despite increasing urbanization has led to problems, but cities are centers of civilization and culture.

In spite of increasing urbanization has led to problems, yet cities are centers of civilization and culture.

Though increasing urbanization has led to problems, cities are centers of civilization and culture.

The industrial production fell quickly in ten years from 1990 to 2000.

The industrial production fell steadily in ten years from 1990 to 2000.

The industrial production rose sharply in ten years from 1990 to 2000.

The industrial production rose slightly in ten years from 1990 to 2000.