Questão número 637965

Read the text below which is entitled "Small Steps for Big Results" in order to answer questions 30 to 32.

The text refers to research

• a.

  carried out by scientists in the United States.

• b.

  into a traditional approach to address addictions.

• c.

  likely to be conducted over the next 30 years.

• d.

  into the growing lack of scientific evidence.

• e.

  derived from unreliable sources in the USA.