Question

Which word or phrase is a suitable replacement for the word Or at the beginning of the second sentence?. A database is a collection of electronic information that can be accessed using a set of software commands. Or, a database is a set of organized information (electronic) manipulated by software.. .
A. In other words.
B. Possibly.
C. Subsequently.
D. Because of this

Answer 1

The word or phrase that is a suitable replacement for the word "or" at the beginning of the 2nd sentence is "In other words." The correct answer is A. 

Answer 2

The word or phrase which is a suitable replacement for the word Or at the beginning of the second sentence is in other words.

In other words is an idiom used to introduce a simpler explanation or interpretation about something which has been just conveyed.

Whereas, other phrases such as 'possibly' doesn't suit in this sentence as possible refer to inconsistency.

'Subsequently' is the transition words which indicates the timeline of the events and 'because of this' is a phrase which is used to depict cause and effect.