Analysis:

Understanding the characteristics of data-driven and keyword-driven automation is crucial for identifying the correct statements.

Correct Pairing:

C . Data Driven = a; Keyword-driven = c:

Data Driven = a: 'The data used for a test is held external to the automated script' is a key characteristic of data-driven testing, where test data is stored separately from the test scripts, allowing the same script to run with different data sets.

Keyword-driven = c: 'It uses a high-level language to separate the action to be performed on the test data from the test script' is characteristic of keyword-driven testing, where keywords representing actions are used to describe test steps, separating the business logic from the test scripts.

Explanation of Incorrect Options:

A . Data Driven = a; Keyword-driven = d: Statement d does not accurately describe keyword-driven testing.

B . Data Driven = b; Keyword-driven = c: Statement b does not accurately describe data-driven testing.

D . Data Driven = d; Keyword-driven = d: Statement d is not accurate for either data-driven or keyword-driven testing.

The ISTQB CTAL-TTA syllabus and standard practices in test automation clearly differentiate between data-driven and keyword-driven testing methodologies.

Sources:

ISTQB-CTAL-TTA Syllabus

General knowledge on test automation methodologies.