In a first of its kind study, / a team of scientist have tried to / 'grow' new stem cells in / the ear that get damage with age.
A. In a first of its kind study,
B. a team of scientist have tried to
C. 'grow' new stem cells in
D. the ear that get damage with age
E. No error
Answer: Option B
Also change to : ... scientists...
team of scientists
B and D
the ear that got damaged with age