In an entente, the signatories merely agree to consult one another in the event of a security-military threat. An example of an entente is the British-French Entente Cordiale of 1904. No firm commitment exists between the partners. Entente agreements are relatively flexible associations, and they make sense only if they serve the common interests of the partners. Secrecy, ideological issues etc. are well delineated in alliance treaties but not in ententes. Therefore, the correct option is D.