Question $5$

In a major data breach, hackers stole payment card data from an e$-$commerce application. An analys$/$s of the incident revealed that the development team had implemented the database access operations using "String concatenation" instead of "Prepared Statement" leading to a dangerous wilnerability known as SQL injection. The company was lined $$5$ million for Tating lo Lake adequate seciurty measures which ted to the introdutien of the prever abie ent injection vulnerability,

Whiek nf than fraltruding is the likely cause for the introduction of this vulrierability?