Free LSAT Practice Questions

Question 1 of 1
ID: LSAT-LR-13
Section: Logical Reasoning
Topic: Strengthen
Difficulty level: Hard

(Practice Mode: Single selected Question » Back to Overview)

In the 1920s, surveys of factory workers who painted watch dials with luminous paint found an alarming incidence of anemia, loss of teeth, bone fractures and death from cancer. This paint contained radium, a radioactive element. As a result, the industrial use of radioactive luminous paint was completely stopped by 1960. However, radium stays active for hundreds of years. Therefore, those watch-collectors who own watches that have luminous dials and were made before 1960 should either bury these watches in the ground or store them in thick lead boxes to protect themselves and the people around them from anemia, loss of teeth, bone fractures and death from cancer.

Which one of the following, if true, LEAST strengthens the argument above?

AThe surveys also found that the incidence of anemia, loss of teeth, bone fractures and death from cancer among factory workers who painted watch dials with non-luminous paint was not greater than that among the general population.

BThe surveys also found that factory workers who painted watch dials with luminous paint, the extent of their health problems was directly proportional to the cumulative number of hours for which they had worked with luminous paint till then.

CBarriers of lead or earth provide adequate protection to human beings from harmful radioactive substances.

DPeople who wear watches that have luminous dials and were made before 1960 for more than a decade have an alarming incidence of anemia.

EMost chemists and laboratory workers who worked with radium for more than a year in the first decade after its discovery in 1898 did not have, for the rest of their lives, a greater incidence of anemia, loss of teeth, bone fractures and death from cancer than the general population.