Final answer:
Dilutive convertible securities are only considered when calculating diluted earnings per share, not basic earnings per share.
Step-by-step explanation:
To answer your question, dilutive convertible securities are only used in the computation of diluted earnings per share (EPS). Therefore, the correct answer to your question is b) diluted earnings per share only. The basic EPS calculation does not take into account the potential conversion of dilutive securities because it represents the earnings attributable to common shareholders using the current number of shares outstanding. In contrast, diluted EPS includes the impact of all potential dilutive securities, such as convertible bonds or options, which would increase the total number of shares outstanding if they were exercised or converted.