Correct Answer:
Option B - उपरोक्त वाक्य में have का प्रयोग as an auxiliary हुआ है, अत: इसके बाद आने वाली verb III form में होगी अत: research के स्थान पर researched का प्रयोग होगा।
Correct sentence-
Many firms fail because when they begin exporting, they have not researched the target market or have not planned enough.
B. उपरोक्त वाक्य में have का प्रयोग as an auxiliary हुआ है, अत: इसके बाद आने वाली verb III form में होगी अत: research के स्थान पर researched का प्रयोग होगा।
Correct sentence-
Many firms fail because when they begin exporting, they have not researched the target market or have not planned enough.