To specialise in (the field of) means to:

• A. Focus On
• B. To Generalize
• C. Ignore
• D. Postpone

Answer: (A)

Specialising in a field means concentrating your study or work on a particular area rather than trying to cover everything. The idea is to pick a specific subfield and develop deeper expertise there, so you focus on particular topics, tasks, or problems within that field. In business computing, for example, you might specialise in cybersecurity, data analytics, or cloud infrastructure, dedicating time to mastering the tools and methods specific to that area. Generalizing would mean broadening your scope to many topics, which isn’t what specialization is about; ignoring or postponing aren’t relevant actions to becoming specialized. So the best fit is focusing on a specific area.