下列关于混凝土各种强度标准值之间的关系正确的是( )。

• A.f<img src="https://timg.fentiku.com/97/2016/12/22/FoxlMvzbgI.png" title='FoxlMvzbgI.png' alt='FoxlMvzbgI.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/cCdZkwJwkj.png" title='cCdZkwJwkj.png' alt='cCdZkwJwkj.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/4yoMPSK7L9.png" title='4yoMPSK7L9.png' alt='4yoMPSK7L9.png'/>
• B.f<img src="https://timg.fentiku.com/97/2016/12/22/BFPCHYkOXc.png" title='BFPCHYkOXc.png' alt='BFPCHYkOXc.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/B8TULEoubs.png" title='B8TULEoubs.png' alt='B8TULEoubs.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/seiDtaTwDm.png" title='seiDtaTwDm.png' alt='seiDtaTwDm.png'/>
• C.f<img src="https://timg.fentiku.com/97/2016/12/22/PGIriBCwG8.png" title='PGIriBCwG8.png' alt='PGIriBCwG8.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/x8ZIFRLald.png" title='x8ZIFRLald.png' alt='x8ZIFRLald.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/BS1puoXTG1.png" title='BS1puoXTG1.png' alt='BS1puoXTG1.png'/>
• D.f<img src="https://timg.fentiku.com/97/2016/12/22/XthpjgCJF5.png" title='XthpjgCJF5.png' alt='XthpjgCJF5.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/ZWZaIlh5rt.png" title='ZWZaIlh5rt.png' alt='ZWZaIlh5rt.png'/>>f<img src="https://timg.fentiku.com/97/2016/12/22/kN8lgL7kEV.png" title='kN8lgL7kEV.png' alt='kN8lgL7kEV.png'/>

正确答案：C