The correct answer is C. Project.
A project is a temporary endeavor with a defined beginning and end (usually time-constrained, and often constrained by funding or deliverables), undertaken to meet unique goals and objectives, typically to bring about beneficial change or added value. The temporary nature of projects stands in contrast with business as usual (or operations), which are repetitive, permanent, or semi-permanent functional activities to produce products or services. In practice, the management of these two systems is often quite different, and as such requires the development of distinct technical skills and management strategies.
A batch is a set of data or programs that are processed together as a unit. Batch processing is a method of processing data in which a set of transactions are grouped together and processed all at once. This is in contrast to online processing, in which each transaction is processed as it is received.
A patch is a piece of software that is used to fix a bug or security vulnerability in a software program. Patches are typically released by the software publisher on a regular basis.
Word is a word processing program that is used to create and edit documents. It is one of the most popular word processing programs in the world.
None of the above is a special one-time operation that must be completed over a limited time period.