Directions: Choose the correct answers that show the logical sequences.
A. Collins had an aggressive cancer that responded well to a certain regimen of prompt chemotherapy.
B. “That was really pretty devastating,” recalls Collins, 66,
C. But a severe shortage of one of the key drugs, he learned, would force a switch to less effective drugs to avoid interrupting treatment.
D. His prognosis would worsen without the drug, cytarabine, from about a 70 percent chance of staying in remission for 10 years to “a tossup”.
E. a retired Viterbo University chemistry professor.