Final answer:
An entry at the intersection of each row and column in a spreadsheet or database has a single value. Each cell is meant to hold only one piece of information, distinguishing it as a unique entity within the grid.
Step-by-step explanation:
Entries in cells are simple, and an entry at the intersection of each row and column has a single value. This is a fundamental characteristic of spreadsheet software, where each cell within a grid can contain a unique piece of data. In the context of data tables or databases, each cell, defined by the intersection of a row (record) and a column (field), is meant to hold only one piece of information. If we take the analogy of a physical ledger or table, each cell in the grid presents one particular detail pertaining to some item or entity.
Considering the reference provided for context, the answer selections seem to be related to Chemistry, specifically classifications of matter. However, these options are not relevant to the question presented. If you're referring to a spreadsheet or table, the correct answer would still be B) Single. The other options such as duplicate, multi, and repeating, imply that there could be more than one piece of data in a cell, which is not the case for typical spreadsheets and databases.