In science writing, which phrase is better?

kbontosk

New member
In science writing, among the following phrases, which is better and why?
And if you have anther better phrase, please let me know.
A: 4 hours incubation or more at 37?
B: Incubation for 4 hours more at 37?
C: Incubation for 4 hours or more at 37?
D: Incubation for 4 more hours at 37?
 
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