Investigator a Claims His Results Are Statistically Significant at the 10

Investigator A claims his results are statistically significant at the 10% level. Investigator B argues that significance should be announced only if the results are statistically significant at the 5% level. From this we can conclude

A) if investigator A has significant results at the 10% level, they will never be significant at the 5% level.
B) it will be more difficult for investigator A to reject statistical null hypotheses if he always works at the 10% level compared with investigator B who works at the 5% level.
C) if investigator A has significant results at the 10% level, they will also be significant at the5% level.
D) it will be less difficult for investigator A to reject statistical null hypotheses if he always works at the 10% level compared with investigator B who works at the 5% level.