Jenna flips a 10p coin four times. Here are her results:
Trial
Result
1. heads
2. tails
3. heads
4. heads

How can Jenna best improve the reliability of her results?
A
flip the 10p coin one more time
B
flip the 10p coin six more times
C
use a 50p coin instead of a 10p coin
D
use a different 10p coin for each of the four trials​